Fans staying on after shutdown

[Russellr1994]

So I just installed a new motherboard (Gigabyte Aorus Z390 Pro WiFi) tonight because I originally ordered the wrong one. After I got it installed my fans are staying on on my Corsair h115i platinum. After I shut the PC down the LEDs turn red and the fans stutter until they start spinning at a very low rpm. It's also worth noting it is just the Corsair fans and my regular case fans that I have hooked up to the fan controller in my case do not seem to have any issues. Both the aio and the fan controller are hooked up to the motherboard. The AIO is hooked up to a CPU fan and the fan controller is hooked up to sys fan one. I have googled it and it seems that it could be a motherboard issue and I didn't have this problem with the other mother board so I am assuming that's it. Does anyone have any experience with this? I have switched off the power supply and unplugged the cord because I don't want to burn up anything if the motherboard is storing power. 

[Meganter]

5 minutes ago, Russellr1994 said:

So I just installed a new motherboard (Gigabyte Aorus Z390 Pro WiFi) tonight because I originally ordered the wrong one. After I got it installed my fans are staying on on my Corsair h115i platinum. After I shut the PC down the LEDs turn red and the fans stutter until they start spinning at a very low rpm. It's also worth noting it is just the Corsair fans and my regular case fans that I have hooked up to the fan controller in my case do not seem to have any issues. Both the aio and the fan controller are hooked up to the motherboard. The AIO is hooked up to a CPU fan and the fan controller is hooked up to sys fan one. I have googled it and it seems that it could be a motherboard issue and I didn't have this problem with the other mother board so I am assuming that's it. Does anyone have any experience with this? I have switched off the power supply and unplugged the cord because I don't want to burn up anything if the motherboard is storing power. 

Did you plug the pump to the USB header ? Because with that you can control the behavior of the pump and fans.

 

Also the Z390 should have a header named "CPU_OPT", it is for the water cooling fan and the "6_PUMP" which is for the pump.

 

What I read in the manual :

5) SYS_FAN5/6_PUMP (System Fan/Water Cooling Pump Headers) The fan/pump headers are 4-pin and possess a foolproof insertion design. Most fan headers possess a foolproof insertion design. When connecting a fan cable, be sure to connect it in the correct orientation (the black connector wire is the ground wire). The speed control function requires the use of a fan with fan speed control design. For optimum heat dissipation, it is recommended that a system fan be installed inside the chassis. The header also provides speed control for a water cooling pump, refer to Chapter 2, "BIOS Setup," "M.I.T.," for more information. Pin No. Definition 1 GND 2 Voltage Speed Control 3 Sense 4 PWM Speed Control DEBUG PORT G.QBOFM 1

 

6) CPU_OPT (Water Cooling CPU Fan Header) The fan header is 4-pin and possesses a foolproof insertion design. Most fan headers possess a foolproof insertion design. When connecting a fan cable, be sure to connect it in the correct orientation (the black connector wire is the ground wire). The speed control function requires the use of a fan with fan speed control design.

 

https://download.gigabyte.com/FileList/Manual/mb_manual_z390-aorus-pro_wifi_1001_190708_e.pdf

[Mick Naughty]

Motherboard should always store power. That how it works. Also if the board offers usb charging while the system is off, that may be the cause. The last board I used did that as that’s the last time I used an aio. 

[Russellr1994]

11 hours ago, Plouffe said:

Did you plug the pump to the USB header ? Because with that you can control the behavior of the pump and fans.

 

Also the Z390 should have a header named "CPU_OPT", it is for the water cooling fan and the "6_PUMP" which is for the pump.

 

What I read in the manual :

5) SYS_FAN5/6_PUMP (System Fan/Water Cooling Pump Headers) The fan/pump headers are 4-pin and possess a foolproof insertion design. Most fan headers possess a foolproof insertion design. When connecting a fan cable, be sure to connect it in the correct orientation (the black connector wire is the ground wire). The speed control function requires the use of a fan with fan speed control design. For optimum heat dissipation, it is recommended that a system fan be installed inside the chassis. The header also provides speed control for a water cooling pump, refer to Chapter 2, "BIOS Setup," "M.I.T.," for more information. Pin No. Definition 1 GND 2 Voltage Speed Control 3 Sense 4 PWM Speed Control DEBUG PORT G.QBOFM 1

 

6) CPU_OPT (Water Cooling CPU Fan Header) The fan header is 4-pin and possesses a foolproof insertion design. Most fan headers possess a foolproof insertion design. When connecting a fan cable, be sure to connect it in the correct orientation (the black connector wire is the ground wire). The speed control function requires the use of a fan with fan speed control design.

 

https://download.gigabyte.com/FileList/Manual/mb_manual_z390-aorus-pro_wifi_1001_190708_e.pdf

After trouble shooting and messing with things I think I have come to the conclusion that it is the CPU cooler. If I plug the fans into the motherboard headers they do not have any issues. They do not try to spin or anything. If I plug system fans into the CPU fan cables that come off the CPU block they start to stutter and spin. I also realized through all of this trouble shooting that the CPU block draws power from a sata cable and after plugging in a new one and changing ports I still have issues. 

 

TLDR Its the CPU cooler itself and hopefully the replacement goes smoothly. 

[Russellr1994]

10 hours ago, Mick Naughty said:

Motherboard should always store power. That how it works. Also if the board offers usb charging while the system is off, that may be the cause. The last board I used did that as that’s the last time I used an aio. 

That's interesting so your aio continued to run the fans after the computer was powered down? I guess that if I get the new aio and still have issues I'll learn to live with it. Did it ever cause you any issues long-term as far as things burning up or the fans going out. Also if I pull my fans and plug them into the board they do not try to spin or have any issues. I'm pretty sure that the issue is with the Cooler.

[Mick Naughty]

19 minutes ago, Russellr1994 said:

That's interesting so your aio continued to run the fans after the computer was powered down? I guess that if I get the new aio and still have issues I'll learn to live with it. Did it ever cause you any issues long-term as far as things burning up or the fans going out. Also if I pull my fans and plug them into the board they do not try to spin or have any issues. I'm pretty sure that the issue is with the Cooler.

They didn’t get enough power to spin. Just try to. The cooler logo would cycle through the colors. 

 

Like I said it’s getting the power from usb which I assume you have it plugged in. Can’t say there were any long term issues as it’s no different than it being on like normal. 

[Russellr1994]

3 hours ago, Mick Naughty said:

They didn’t get enough power to spin. Just try to. The cooler logo would cycle through the colors. 

 

Like I said it’s getting the power from usb which I assume you have it plugged in. Can’t say there were any long term issues as it’s no different than it being on like normal. 

Mine actually gets power from a sata cable but the conclusion that I came to is that it is pulling power for some reason even though it shouldn't be so it has to be something in the CPU cooler itself. Also thanks for the info it atleast makes me feel better that they aren't going to damage anything. 

[Mick Naughty]

6 hours ago, Russellr1994 said:

Mine actually gets power from a sata cable but the conclusion that I came to is that it is pulling power for some reason even though it shouldn't be so it has to be something in the CPU cooler itself. Also thanks for the info it atleast makes me feel better that they aren't going to damage anything. 

Yea they all get additional power. But if it’s plugged into the usb, it’s getting power. Unplug it and see.